| Records kept for more than two centuries show that sunspots wax and wane in number and extent twice in about every 23 years on the average. |
| According to the seasons, the polar caps on Mars wax and wane, as breathtaking a sight, in the course of the Martian year, as it is on Mother Earth. |
| Moreover, 'mobs' need to be defined situationally, as they wax and wane in size depending on the occasion. |
| Because the symptoms of fibromyalgia wax and wane, treatment is an ongoing process rather than management of a single episode. |
| Even so, Al-Qaeda's influence will likely still eventually wax and wane as other groups have done before it. |
| Remember, these diseases can wax and wane with time, and if in a nonactive state, treatment may not be helpful, and only result in side effects. |
